Testing The Carriers - Avaya Communication Server 1000M Single Group Manual

• Unavailable seconds — Unavailable state starts with 10 consecutive severely errored
seconds and ends with 10 consecutive non-severely errored seconds (excluding the final
10 non-severely errored seconds)
• Frame slip seconds — one or more frame slips in a second
• Loss-of-frame seconds — Loss-of-frame or loss-of-signal for three consecutive seconds
When the T1 framer is configured for D4 operation, the firmware uses bipolar violations instead
of CRC-6 errors. When using bipolar violations, the total number of bipolar violations is used
as CRC-6 errors in the above calculations.
The MMI maintains an overall error counter which is a sum of all the errors counted for the six
performance criteria listed above. The error counter may only be cleared by entering the CLEAR
ERROR (C E) command. The error counter will stop counting at 65,000. The error counter
provides an easy method to determine if an alarm condition has been corrected. Simply clear
the error counter, wait for two to three minutes, and enter a DISPLAY PERFORMANCE (D
P) command. Then check the error counter to see if any errors have occurred since the counter
was cleared.
MMI displays performance-counter reports through the DISPLAY PERFORMANCE (D P) (see
Checking the carrier performance status

Testing the carriers

Use the following procedures for testing the carriers.
After checking the carrier status report and performance log and finding that one or
more carriers is faulty, proceed to isolate the cause by testing the carriers using the
TEST (T) command. The screen displayed by the TEST (T) command is similar to
Figure 63: TEST screen
Figure 63: TEST screen
The TEST (T) command allows you to run tests on the local or remote MCR card,
the T1 links, or network equipment. The five available tests are designed to provide
you with the capability to isolate fault conditions to a specific source. After entering the
Mini-Carrier Remote Fundamentals
on page 107).
on page 109.
MMI diagnostic tools
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